摘要
研究描述人脸特征的有效方法,讨论身份证照片的特征提取和检索.采用自适应肤色检测技术改进通用的肤色检测算法,进行脸部区域的划分.提出 DCT 系数投影法对面部五官区域进行分割,在各区域中提取面部几何特征.引入描述脸颊和下颔轮廓的曲线参数作为脸形特征,得到对人脸特征更准确的描述.将面部几何特征矢量匹配、脸形曲线参数匹配和脸部图像相关匹配相结合,实现人像照片的准确检索.实验表明该方法性能优良.
Feature extraction from ID photos is discussed to retrieve subjects in ID photo database. By an adaptive threshold, a general skin color detection algorithm is modified for face region segmentation. The extracted face region is then segmented into individual organs by using the proposed projection DCT coefficients. Thus organ feature points are obtained. To improve the face description ability, the parameters of cheek profile are added to feature set by polynomial curve fitting. A photo retrieval system is implemented using the described methods and satisfactory results are acquired.
出处
《模式识别与人工智能》
EI
CSCD
北大核心
2007年第4期545-551,共7页
Pattern Recognition and Artificial Intelligence
关键词
图像检索
肤色检测
特征提取
脸形
Image Retrieval, Skin Color Detection, Feature Extraction, Face Profile